[chasil]

Bash does not "turn off" all its extra functionality when called as /bin/sh, it just alters the behaviors that are clearly in conflict with (what was) POSIX.2.

Arrays are still available in POSIX mode, even though they do not comply.

[stouset]

Which is why I think it’s good that Debian has a POSIX-strict `/bin/sh`. I have no idea what bash’s flawed POSIX mode has to do with this.